Control of the heat of hydration for concrete f'c 210 kg/cm² with superplasticizer additive in urban buildings

Abstract

The increase in temperature during the concrete setting period is the product of the hydration of the cement paste, generating tensile and compressive stresses in the structural element that would later become cracks that affect the performance and durability of the concrete and even endangering the integrity of the structures in our country. In this sense, this research work had the objective of determining the variation in the heat of hydration of concrete f'c 210 kg/cm2 for urban buildings, by adding the superplasticizer additive Viscocrete SC-50; to control the heat of hydration of concrete f'c 210 kg/cm2. The research presented a quantitative approach, quasi-experimental design, since at least one study variable was manipulated; presented a descriptive depth with a sample of 45 specimens that met the criteria of ACI 318-19 regulation (Chap. 26). The results allowed estimating that with the addition of 1,00 % of Viscocrete SC-50 superplasticizer additive, the temperature remains constant in a period of 14 hours, then increases proportionally until 23 hours, reaching the maximum peak of 32,5 °C in a range of 32 to 36 hours, with the average difference between the standard sample and the addition of 1,00 % of Viscocrete at 28 days of age being 61 kg. /cm2 and settlement with 1,00 % Viscocrete 8,50, 8,50 and 7,50 in in 0, 30 and 60 minutes respectively.